Stop motion for sliver coiling devices



Feb. 10, 1970 J. HUG E STOP MOTION FOR SLIVER COILING DEVICES 2 Sheets-Sheet 2 Filed Sept. 23. 1968 Eng. 3

INVENTORS JO BF HUG Hi N5 RUTZ United States Patent ()fi'ice 3,493,999 Patented Feb. 10, 1970 3,493,999 STOP MOTION FOR SLIVER COILING DEVICES Josef Hug and Hans Rutz, Winterthur, Switzerland, as-

signors to Rieter Machine Works, Ltd., Winterthur,

Switzerland, a corporation of Switzerland Filed Sept. 23, 1968, Ser. No. 761,541

Claims priority, application Switzerland, Sept. 27, 1967,

Int. Cl. DOlg 31/00 U.S. Cl. 19.25 4 Claims ABSTRACT OF THE DISCLOSURE This invention relates to a stop motion for sliver coiling devices. More particularly, this invention relates to a stop motion for sliver coating devices wherein the calender rolls have a rotary movement.

In the operation of a spinning mill, defects in a sliver which is fed to a sliver coiling device have frequently occurred and have remained undetected for a considerable period of time because an operator has failed to pay attention or has been occupied elsewhere. Thus, production loss or even machine damage causing prolonged down time and costly repairs can arise. The sliver defects which occur most frequently are broken slivers caused by interruptions in the feed of a preceding machine, e.g., lap run out on cards, broken web or sliver in front of the coiling device. Also, defects can be caused by the formation of lap-ups on the calender rolls used in the coiling device to convey the sliver as well as by clogging of the sliver duct within the coiling device for guiding the sliver to a sliver can.

Heretofore, in order to detect any defect in the sliver delivery, such as, a sliver break or lap-up, in sliver coiling devices or so-called coiler heads in spinning machines which have utilized a pair of calender rolls for guiding a sliver into a sliver duct mounted in a coiler gear rotating below the calender rolls, at least one of the calender rolls has been pivotally mounted with respect to the other. Further, the pivotally mounted roll has been suitably connected to a stop motion switch so as to activate the switch upon the simple pivoting movement of the roll from a normal medium position exceeding certain limits. The pivoting movement has been designed so that upon sliver breakage, the calender roll pivots inwardly and upon formation of a sliver lap-up, the calender roll pivots outwardly. Upon either pivoting movement exceeding the predetermined limit, the stop motion switch has been activated to stop the coiling device.

However, these heretofore coiling devices have used calender rolls which are mounted in a stationary position within the device, whereas coiler heads which are currently used, and in which the sliver can does not rotate, have a coiler table containing a sliver duct which is eccentrically mounted in a rotating disc wherein the calender rolls must follow the circular motion of the coiler table. Consequently, the stop motions of the former type can no longer be used.

Accordingly, it is an object of the invention to provide a stop motion for a sliver coiling device having rotating calender roll assemblies.

Briefly, the invention provides a sliver coiling device having a rotating calender roller assembly movably mounted over a sliver duct of a rotatable coiler table with a stop motion. The stop motion includes a rotatably mounted stop motion disc above the calender roller assembly and a relay switch which is sensitive to the height of the disc for switching off the drive of the coiling device. The stop motion further includes a lever which is slidably hinged to the disc at one end and to a pivotally mounted calender roll of the calender roll assembly at the opposite end. In addition, the disc is slidably supported in a pair of fixed supports to one side and is pivotally connected to the switch at the other side.

In use, should the pivotally mounted calender roll pivot under the occurrence of a sliver break or lap-up, the lever causes the disc to pivot about the fixed supports so as to activate the switch at the other side. The switch in turn deactivates the coiling device drive.

These and other objects and advantages of the invention will become more apparent from the following detailed description and appended claims, taken in conjunction with the accompanying drawings, in which:

FIG. 1 illustrates a cross-sectional view of a coiler head incorporating a stop motion according to the invention;

FIG. 2 illustrates a view taken on line IIII of FIG. 1; and

FIG. 3 illustrates a view taken on line III-III of FIG. 2.

Referring to FIG. 1, the coiler head has a stationary housing 1 which rotatably supports a disc 2 having a gear rim 3 and a gear 4 which drives the gear rim 3. Further, a coiler table 5 which incorporates a sliver guide duct 6 is mounted to rotate about a center line offset by an eccentricity e from the axis of the disc 2. The coiler table 5 is provided with an outer gear 7 permanently in mesh with a larger inside gear 8. The gear 8 is rotatably mounted on the disc 2 and the outer gear rim is driven by a gear 9 in a known manner. A support member 10 is fixed on the disc 2 and carries drive gears 11, 12 and a support 13 for a respective pair of calender roll shafts 14, 15. A respective pair of calender rolls 16, 17 on the shafts 14, 15 form a nip which conveys a sliver 18 from a funnel 17' into the upper orifice of the sliver guide duct 6 which rotates on the same circle as the calender roll nip and funnel 17'. The funnel 17' is mounted in a cover disc 19 fixed onto the support 10 by means of a connecting stud 20. The coiler head also has a stationary cover which encloses the interior of the coiler'head.

Referring to FIGS. 1 and 2, a stop motion disc 21 is rotatably mounted about the connection stud 20 in spaced relation between the calender rolls 16, 17 and cover disc 19 to rotate with the support member 10 under the driving influence of a rod 22 extending from the cover disc 19.

Referring to FIGS. 2 and 3, the disc 21 is supported at three points on the periphery by a pair of bearings 23, 24 and a pivotally mounted lever 29 on the coiler head. The bearings 23, 24 slidably engage the rim of the stop motion disc 21 from above and below to guide the disc 21. In addition, the bearings 23, 24 are spaced less than apart from each other. The lever 29 carries a ball head pin 25 which is inserted into a groove 26 in the rim of the stop motion disc 21 to slidably support the disc 21 at a point opposite and equidistant from the bearings 23, 24. In addition, the lever 29 is linked to a switching roll of a relay which is adapted to switch off the drive of the whole coiler head when released.

Referring to FIG. 2, one of the calender rolls 17 is fixed with respect to the support 10 while the other roll 16 is mounted on a support member 27 pivotally mounted on in a level position as shown in FIG. 2. In the event that the sliver is missing, the calender roll 16 moves upwardly under the action of the spring 30 pivoting the stop motion disc 21 about the bearings 23, 24 into the dotted line position as shown in FIG. 2. This also pivots the lever 29 so as to release the switching roll of the relay and to effect stopping of the coiler head. Similarly, if a lap-up of sliver forms on the calender rolls 16, 17, the roll 16 pivots in the opposite direction (counterclockwise as shown) to depress the stop motion disc 21 into the lower dotted line position as shown. This also pivots the lever 29 counterclockwise to release the switching roll and to thereby deactivate the coiler head.

What is claimed is 1. In combination with a coiler head having a pair of calender rolls mounted on a rotatable disc gear, at least .one of said rolls being movable to the other, and a coiler table eccentrically rotatably mounted in said disc gear under said rolls; a stop motion including a stop motion disc coaxially rotatably mounted over said disc gear and said calender rolls, at least a pair of bearings spaced less than 180 apart in fixed relation to said coiler head slidably supporting said stop motion disc on the periphery thereof, a switch for deactivating said coiler head sensitive to the height of said stop motion disc and in fixed relation to said coiler head slidably hingedly supporting said stop motion disc at a point opposite said bearings, and means connecting said stop motion disc to said one calender roll for pivoting of said stop motion disc about said bearings in response to movement of said one roll to activate said switch.

2. The combination as set forth in claim 1 wherein said switch includes a lever pivotally mounted with respect to said stop motion disc and a pin secured in said lever and hingedly mounted in said stop motion disc to pivot said lever in response to pivoting of said stop motion disc.

3. The combination as set forth in claim 2 wherein said stop motion disc includes an annular groove in the periphery thereof slidably receiving said pin therein.

4. The combination as set forth in claim 1 wherein said means includes a lever slidably hinged to said stop motion disc at one end and to said one calender roll at the opposite end.

References Cited UNITED STATES PATENTS 2,270,720 1/ 1942 Thompson. 3,407,446 10/ 1968 Whitehurst 19--.26

FOREIGN PATENTS 862,417 1/ 1953 Germany.

DORSEY NEWTON, Primary Examiner U.S. Cl. X.R. 19-.26 

